JPS5938504Y2 - Inclined cylindrical fender - Google Patents

Description

[Detailed description of the invention] The invention consists of a cylindrical body with a rubber elastic body,
A cylindrical rubber fender comprising mounting flanges integrally formed at both ends of the body and parallel to each other is attached to the quay wall, etc. so that its axis is perpendicular to the mounting plane of the quay wall, etc. This article relates to improvements to the tentatively named pot-shaped rubber fender used.

For example, as shown in FIG. 1, one of the currently popular types of rubber fenders attached to quay walls has an oblong structure with a cross-sectional shape that is approximately in the shape of an inverted square.

Hereinafter, this will be tentatively referred to as ■-shaped fender.

A fender with an oblong structure, such as this V-shaped fender, generally exhibits a relatively large reaction force against the fender load applied along its longitudinal direction (a-a), but It is known that the reaction force against the side load along the width direction (bb) perpendicular to the width direction is smaller than the reaction force against the former.

In order to improve the drawback that the reaction force or cushioning performance differs depending on the direction of coming alongside, as shown in FIG. mounting flanges 2 and 3, and the axis (Y-Y) of the body 1 is located on a mounting plane such as a quay (X-X
) Pot-shaped rubber fenders have been proposed that are installed perpendicular to quay walls, etc.

Since this pot-shaped fender is installed and used as described above, it does not have the drawback that the cushioning performance differs depending on the direction of the fender, unlike the oblong structure such as the V-shaped fender mentioned above, and it is cylindrical. Therefore, V-shaped fenders are easy to manufacture.
Furthermore, the amount of energy absorbed per unit amount of rubber is also superior to those with oblong structures such as ■-shaped fenders.

However, this pot-shaped fender also has weaknesses. That is,
It shows a strong reaction force against the compressive force f1 in the direction along the axis (Y-Y), but it shows a strong reaction force against the compressive force f2 in the direction diagonal to the axis compared to the former. Inferior.

Therefore, in some cases, an inclined mounting surface is formed on the quay as shown in FIG. 3, and the device is mounted on the inclined mounting surface so that the axis (Y-Y) is perpendicular.

The present invention focuses on the above-mentioned drawbacks of known pot-type fenders, and takes advantage of the advantages of these fenders, such as ease of production and excellent energy absorption performance per unit amount of rubber. It is designed to have a structure that can exhibit excellent strength against the side load, and by combining multiple pieces, it provides an inclined cylindrical fender that can sufficiently resist the side load from all directions. .

The inclined cylindrical fender of the present invention is shown in Figures 4 and 5.
As shown in the figure, it comprises a cylindrical body 1 and mounting flanges 2 and 3 that are integrally formed at both ends of the body and parallel to each other, and the axis (Y-Y) of the body is aligned with the mounting flange 2 or 3. An assumed vertical plane (Yl-
It means a cylindrical fender configured to extend obliquely at an appropriate angle θ with respect to Yl).

As mentioned above, by tilting the axis (Y-Y) of the cylindrical body 1, the strength of the fender increases with respect to the external force F in a specific direction of inclination, and the strength of the fender increases in the direction of extension of the axis and the external force F. When the working force directions of both are the same, the yield strength is maximum.

On the other hand, the assumed vertical plane (yl-y,) perpendicular to the quay of the ship
It is said that the maximum angle of inclination θ1 is 9 degrees, and it varies variously within this angle range, and does not necessarily match the inclination angle θ of the axis (Y-Y) of the cylindrical fuselage 1. Not exclusively.

Therefore, in order to exhibit sufficient strength against inclined berthing in various different directions within the above-mentioned angular range, the cylindrical body 1 of the fender of the present invention has an end on the side where the impact plate 4 is attached. From the intersection P of the plane of the mounting flange 2 formed in the section and the axis (Y-Y) of the cylindrical body 1,
A mounting flange portion 3 integrally formed at the end of the quay wall mounting side.
A perpendicular line (P-Y2) drawn to the plane (X-X) of the cylindrical body 1 is formed so that it passes radially inward from the outer circumferential surface of the cylindrical body 1 at the end continuous with the quay wall mounting side flange part 3. Should.

In other words, the distance A from the center Q of the quay-mounted end surface of the cylindrical body 1 to the intersection Q' of the perpendicular line (P-Y2) on the end surface is smaller than the outer diameter R of the cylindrical body 1. is formed as follows.

In the fender of the present invention having the above structure, as the inclination angle θ of the axis (Y-Y) increases, the outer diameter R of the cylindrical body increases, and as the inclination angle θ decreases, the outer diameter R also increases. It becomes smaller accordingly.

Furthermore, as the height H of the fender increases, the outer diameter R of the cylindrical body 1 increases, and as the height H decreases, the outer diameter R also decreases.

Note that if the distance A from the center Q of the quay-mounted end face of the cylindrical body 1 to the intersection Q' of the perpendicular line (P Y2) on the end face is greater than the outer diameter R of the cylindrical body 1, the ship's Incapable of exhibiting sufficient strength against inclined berthing.

The fender of the present invention is entirely composed of a rubber elastic body such as natural rubber, styrene-butadiene copolymer rubber, polybutadiene rubber, other synthetic rubbers, or blends thereof, and the mounting flanges 2 and 3 are A reinforcing plate 5 is embedded as desired.

In addition, in the figure, 6 is a bolt insertion hole.

As shown in Fig. 6, the proposed fender with the above-mentioned structure has two or more fenders with their respective axes (Y-Y) inclined outward to the left and right, and the mounting flange portions 2 are bolted to the quay wall. An impact receiving plate 4 is installed on the other mounting flange 3, and if desired, a known upright cylindrical fender 7 is incorporated as shown by the dotted line in the figure.

The inclined cylindrical fender of the present invention, constructed as detailed above, exhibits sufficient resistance to the slanted approach that often occurs during actual coming alongside, and since it is based on a cylindrical shape, it It has the advantages of being easier to manufacture than structural rubber and having superior energy absorption properties per unit amount of rubber.

[Brief explanation of drawings]

Figure 1 is a perspective view showing an example of a conventional oblong structural fender;
2 and 3 are perspective views of a conventional upright cylindrical fender and a front view showing an example of how the fender is installed, and FIGS. 4 and 5 are plan views of the fender of the present invention. FIG. 4 is a sectional view taken along the line a-a in FIG. 4, and FIG. 6 is a front view showing an example of the manner in which the fender of the present invention is attached. 1... Cylindrical body, 2, 3... Mounting flange portion, 4... Impact plate material, 5... Reinforcement plate, 6... ...Bolt insertion hole, 7...Upright cylindrical fender.

Claims (1)

[Scope of utility model registration request] The cylindrical body is provided with a cylindrical body having a rubber-like elastic body, and mounting flanges integrally formed at both ends of the body and parallel to each other, and the cylindrical body has a cylindrical body which is attached to the axis at one end thereof. The perpendicular line drawn from the intersection with the plane of the flange to the plane of the mounting flange continuous to the other end is inclined so as to pass radially inward from the outer peripheral surface of the other end of the body. A characteristic inclined cylindrical fender.